Spectral enrichment and wall losses in trombones played at high dynamic levels - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Spectral enrichment and wall losses in trombones played at high dynamic levels

John Chick
  • Fonction : Auteur correspondant
  • PersonId : 883208

Connectez-vous pour contacter l'auteur
Murray Campbell
  • Fonction : Auteur
  • PersonId : 939968

Résumé

The characteristic spectral enrichment in the radiated sound of a brass instrument played at high dynamic levels is primarily a result of two closely coupled effects: the nonlinearity at the input to the tube, ie the lip aperture/mouthpiece effect; and the gradual nonlinear distortion of the wave form as it travels along the length of the instrument. In an instrument such as a trombone, which is largely comprised of cylindrical tube, the nonlinear distortion of the wave form can be dramatic, to the point of developing into a shock wave. The higher frequency components of the sound wave suffer more from viscothermal wall losses than do the lower frequency components. These losses act to damp the high frequency components to some extent. Experiments using cylindrical tubes of length and diameter representative of those of a trombone, have been carried out. The results of these experiments are compared with numerical simulations based on weakly nonlinear shock theory in an attempt to better understand the relationship between nonlinear distortion and the effect of the viscothermal losses.
Fichier principal
Vignette du fichier
hal-00811284.pdf (251.86 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00811284 , version 1 (23-04-2012)

Identifiants

  • HAL Id : hal-00811284 , version 1

Citer

John Chick, Shona Logie, Murray Campbell, Joël Gilbert. Spectral enrichment and wall losses in trombones played at high dynamic levels. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811284⟩
85 Consultations
64 Téléchargements

Partager

Gmail Facebook X LinkedIn More